CN103535116A - An occupancy sensor - Google Patents
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- CN103535116A CN103535116A CN201180067050.6A CN201180067050A CN103535116A CN 103535116 A CN103535116 A CN 103535116A CN 201180067050 A CN201180067050 A CN 201180067050A CN 103535116 A CN103535116 A CN 103535116A
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- 239000000523 sample Substances 0.000 claims abstract description 14
- 230000007958 sleep Effects 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 230000000052 comparative effect Effects 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 11
- 238000005265 energy consumption Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002618 waking effect Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005059 dormancy Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/19—Controlling the light source by remote control via wireless transmission
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/115—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings
- H05B47/13—Controlling the light source in response to determined parameters by determining the presence or movement of objects or living beings by using passive infrared detectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
An occupancy sensor (S) includes: - a sensing probe (101) to detect occupancy (P) of a space monitored by the sensor (S) and produce a corresponding sensing signal, - a comparator (104) including a voltage divider (RA, RB, R1, R2, R3, RC) defining a comparison value (A, B) against which the sensing signal is compared to detect occupancy, and - a voltage sensing means (105) to sense a feed voltage (Vbattery) applied to the sensor (S), wherein changes in the feed voltage (Vbattery) to the sensor induce a change in the comparison value (A, B). The voltage divider (RA, RB, R1, R2, R3, RC) includes one or more resistors (R1, R2, R3) selectively switcheable (Q1, Q2, Q3) to counter changes induced in said comparison value (A, B) by changes in the feed voltage (Vbattery) DEG For instance, the voltage divider (RA, RB, R1, R2, R3, RC) may define a comparison window for the sensing signal with a width between an upper threshold (A) and a lower threshold (B), and may include one or more resistors (R1, R2, R3) selectively switcheable (Q1, Q2, Q3) to counter changes in the width of the comparison window (A, B) induced by changes in the feed voltage (Vbattery) DEG.
Description
Technical field
The disclosure relates to the control technology based on taking.
In each embodiment, the disclosure can relate to based on taking to control light source.
Background technology
For control be arranged in the space that will be illuminated such as the room of school, kindergarten's (as shown in Figure 1 schematically) etc., such as the light source of luminous element L, can comprise that transducer S is to detect taking and such as not needing, switch etc. being carried out under the situation of any manual intervention, light source L being activated of this space.
For example, in being configured to have the system that is connected to the identical a plurality of wireless networks that take transducer S that are activated device (luminous element or one group of luminous element or according to taking any other device being activated), each transducer S is regularly to being activated its seizure condition (taking/vacant) of detecting of device report.Even if this means and there is no (it is common state in most of practical situation) when occupied in surveyed area, status report is still sent out.
On the one hand, this generic operation causes the high energy in sensor side, because send and receive occupies the most energy consumption in the energy budget of sensor device conventionally.Especially for battery powered device, this reduces battery significantly.On the other hand, be activated device when processing the different state of two of being reported by different sensor devices, very complex becomes.
Thus, be activated device must be apprised of be connected to it transducer sum and which sensor device send which state.For example, the luminous element that receives " vacant " status report must know whether that existence may send other sensor device of " taking " status report.
The inventor has been noted that these problems can solve in the following manner:
-each network only only sends state variation with single actuator;
-using a plurality of transducers, this may cause asynchronous switching and user's confusion;
The more batteries of-use or lasting power supply;
-make sensor device always listen to wireless telecommunications and revise (for example synchronous) their status report (for example, as long as other device sends " taking " status report, not sending " vacant " report) according to the status report of other device; This may mean that the radio of sensor device must be connected always and this may cause tremendous influence again to power consumption.
Similarly, in order to process the different status report from several devices, be activated device must be apprised of be connected to it transducer sum and which sensor device send which state; Address this problem and (for example may need logical combination, only when all known sensor device report " vacant " states, such as luminous element etc., being activated device just disconnects): this requires to have the memory of some in being activated device, this memory normally quite rare and be also expensive.
Similarly, inventor has been noted that, in having the battery powered wireless network that takies transducer, for example reduces the energy consumption of sensor assembly, for guaranteeing that be necessary long useful life (may wish it is several years for standard cell).
Inventor has been noted that the length of life output voltage at standard alkaline type battery may reduce over 30% equally, and this has tremendous influence to the power supply of transducer and the circuit for Signal Regulation associated with it.
In the situation that use the battery powered transducer that takies of passive infrared (Passive Infra Red, PIR) transducer or probe, the minimizing of cell voltage may cause the increase of less desirable sensitivity, then increases the risk of error detection.This is due to the fact that circuit for signal conditioning may obtain signal level from cell voltage in various embodiments.
What inventor had noted is, can for example, by using special battery (lithium battery, it can maintain in their most of length of life their output voltage and only demonstrate pressure drop in their end in useful life) or by with solar panel and can be combined with the battery that energy is offered to transducer and avoid this less desirable result.
Such configuration must be costliness and unpractical.
Summary of the invention
The present invention has the object of the shortcoming of the technical scheme that overcomes previous general introduction.
According to the present invention, utilize the feature proposing in claims subsequently to realize above-mentioned purpose.
The disclosed major part of technology of the present invention that provided is herein provided claim.
In certain embodiments, in order to reduce radio turn-on time and then to reduce power consumption, only when detecting, sensor device there is (presence), just can use radio (as radio signal, as being situation in wireless system) state that periodically sends " takies ", and do not send whatever under " vacant " state.
In certain embodiments, for reduce energy consumption, only detect there is (taking) just time message be sent to system; Otherwise not with network service.
In certain embodiments, being activated device (directly or by the sensing data aggregate device of other permanent supply) listens to transducer or is connected to and be activated other control device (for example switching and Long-distance Control) of device and for example have own internal logic (for example retriggerable timer), to decide unlatching or to close this load (lamp) according to the triggering signal being received (" taking " status report) and the status report that affects other control device of this characteristic.
In certain embodiments, the time between " taking " status report of sensor device can be used for optimization energy consumption.
In certain embodiments, being activated device can be apprised of in addition report interval and (for example pass through fixed configurations, or more flexibly, as the additional information together with " taking " status report) and if surpass this report time interval, in this report, in the time interval, do not receive further status report simultaneously, be activated device can automatically work (for example, by lamp being switched to disconnection).In this case, whether status report is sent and is all had no relations by single-sensor device or a plurality of sensor device, because each status report receiving only can be reset at the timer that is activated the control report time interval in device.
In certain embodiments, be activated device and not necessarily need to know the quantity of each sensor device and state separately, because as long as " taking " status report is received within known report interval time, it just automatically works, and if do not receive status report, it can for example, work according to its application (disconnecting) again.
In certain embodiments, and if be activated device, also can listen to that manual control device's instruction is necessary ignores sensor states report according to them.
In certain embodiments, sensor device needn't make radio connect always, because only must make its connection just enough during quilt report over report interval and " existence ".For remaining time, the low-power mode that this device can disconnect in radio.
In certain embodiments, sensor device only must make its radio connect just enough during quilt report over report interval and " existence "; For remaining time, this device can be in sleep pattern.
In certain embodiments, in order to realize long battery, need only nobody in surveyed area, transducer (and being mainly the microcontroller that can be included in wherein) can be in sleep pattern.
In certain embodiments, once comprise that the signal of transducer adjusts the circuit of function and only may expend several microamperes and exist and be detected, wake microcontroller up.
Some embodiment can compensate the variation that reduces the sensitivity of the signal monitoring that takies transducer causing due to cell voltage.
Accompanying drawing explanation
With reference now to accompanying drawing, only by nonrestrictive example, the present invention is described, in the accompanying drawings:
Fig. 1 is explanation hereinbefore;
Fig. 2 is the sequential chart that the signal that generated is in certain embodiments shown; And
Fig. 3 and 4 is the block diagrams that take transducer.
Embodiment
In the following description, provide many concrete details so that the overall understanding to each embodiment to be provided.Embodiment can or utilize other method, parts, material etc. to be put into practice under the situation of neither one or more concrete details.In other example, known structure, material or operate not shown or do not explain, to avoid making the each side of embodiment not understand.
At specification, everywhere, quoting of " embodiment " represented to be included at least one embodiment about the described specific feature of this embodiment, structure or characteristic.Therefore the phrase " in certain embodiments ", occurring everywhere at this specification may not all relate to identical embodiment.In addition, specific feature, structure or characteristic can be merged in any suitable manner in one or more embodiment.
The title that provided is herein only used to conveniently and does not explain scope or the implication of embodiment.
Just as already noted, Fig. 1 schematically shows the control system based on taking, and this system is to be arranged on for controlling the exemplary form of system of wanting the light source of for example one or more luminous element L in illuminated space as the room of school, kindergarten etc.A plurality of transducer S that this system comprises taking of detection space and light source L is activated.
Example system shown in Figure 1 is configured to have and is connected to the identical a plurality of wireless networks that take transducer S that are activated device (for example,, such as luminous element or one group of luminous element or according to taking the light source L such as any other device that are activated).Controlled device can directly start or by other the sensing data aggregate device of permanent supply, be adapted for from (for example battery powered) transducer S collect signal and correspondingly the device of activation/deactivation controlled device start.
Except below by explanation, comprise that the general layout of the system that is activated device (for example light source L) and takies transducer S and operation are conventional in the prior art, so more detailed explanation need not be provided in this article.
Comprise be respectively designated a), b) and Fig. 2 of three parts c) on shared time range t, show the sequential chart of following content:
(part a) for the exemplary output signal of being sent by any sensor S;
There is P (taking) (part b) in the people who is detected by discussed transducer; And
By system, started startup (connection)/inactive (disconnection) of the device (for example,, such as light sources such as one or more luminous elements) of controlling.
The output signal of being sent by transducer changes between low-power level LP and high power levels HP.
When the expression supposition of Fig. 2 detects " existence " P (taking) at time T P place, output signal is in low-power level LP.
As this result, transducer is at time frame t
tIinside be switched to high-power mode (radio unlatching), wherein transducer is connected to network and keeps in touch with being activated device L (or its actuator being connected), to send its " taking " status report and then to turn back to low-power level LP.
In Fig. 2, t
dIrepresent sensor device in low-power mode LP (radio disconnection), two high power node time frame t
tIbetween time.In this pattern, this device can bootup window should be used for detecting and exist or in dormancy.
Finally, in Fig. 2, t
rIrepresent the time frame between two " taking " status reports.The internal timer for example, with being activated device (light source) relevant is set to this value after receiving " taking " status report.If during this period of time receive another, " take " status report, this timer is reset as t
rI.If do not receive " taking " status report within that time interval, this actuator will disconnect its load.
It being understood that power consumption and timeline are all less than chi drafting in proportion.In fact, for the time t of sending and receiving
tIwith t
dIcompare common much shorter.
Similarly, the difference between " low-power mode " LP and " high-power mode " HP is relatively much bigger than the difference between baseline and " low-power mode ".
In the exemplary embodiment considered in this article:
-status report periodically not conventionally, if but a certain P of existence detected, only send " taking " state, and unoccupied as long as this state is not converted to, just periodically send this report;
-in addition, movement device for example can be apprised of, about report interval (passing through fixed configurations) and if surpass this report time interval and do not receive further status report from any device in this report in the time interval, movement device can automatically work (for example, by lamp being switched to disconnection): in this case, whether status report sends by single-sensor device or a plurality of sensor device is inessential, because each status report receiving is only reset at the timer in the control report time interval in movement device.
Therefore, in the exemplary embodiment considered in this article, for being activated device L, do not need perception all the sensors device S, because as long as " taking " status report is received in known report interval, it is automatically effect just, and if no longer receive status report, it for example, acts on according to its application (disconnecting).Therefore,, for sensor device, do not need radio is connected always.
The block representation of Fig. 3 use any known type sensor 101 (for example passive infrared (Passive Infra Red, PIR) transducer or probe) take transducer S.
The signal (can represent to take, for example, have one or more individuals in the surveyed area being covered by transducer S) generating thus can amplify and filtering by two or more cascade amplifying stages 102,103.The signal that can produce by adjustment like this is fed into the window comparator 104 comprising such as limiting respectively two comparator element such as operational amplifier 104a, 104b of upper and lower threshold value or limit value.When the signal that is supplied to comparator 104 reaches a certain upper threshold value level or lower threshold value level, the output of window comparator 104 changes to height and can carry out " waking up " previously circuit 105 of the transducer in " sleep " pattern (for example microcontroller) with the power consumption reducing from low.
Some embodiment can adopt such window comparator (being two threshold values), because pop one's head in, 101 can the constant output voltage between the upper and lower level threshold at window comparator be provided and only the variation of infrared radiation be reacted not detecting when mobile.
For example, probe 101 can comprise having the lens that infrared radiation are incident upon to lip-deep several of detection: when people moves to from the region being covered by a face region being covered by another face, the infrared radiation on sensor surface changes and sensor signal (direction moving according to this) increases or reduces; Therefore, this signal (not detecting when mobile it between the gentle lower level of powering on of window comparator) can rise (and surpassing upper level) or reduce (and lower than lower level).In certain embodiments, only this variation of amplification sensor output voltage of circuit for signal conditioning (for example 102,103).
According to the basic conception of the exemplary embodiment of Fig. 3 (and similar map 4), be to there is the voltage divider that limits at least one comparison value, by least one comparison value of signal and this of transducer or 101 generations of popping one's head in (as adjusted by level 102 and 103), compare to detect existence in the surveyed area of transducer S/take.
In the exemplary embodiment of Fig. 3, be inserted in supply voltage (V
battery) and ground connection between voltage divider comprise first, second and the 3rd resistor RA, RB, the RC of series connection.
Intermediate point A between the first and second resistor RA and RB is connected to op-amp(operational amplifier) paraphase of 104a input and therefore limit upper threshold value or the limit value of the detection window of comparator 104.
Intermediate point B between the second and the 3rd resistor RB and RC is connected to the homophase input of op-amp104b and therefore limits lower threshold value or the limit value of the detection window of comparator 104.
This means voltage divider RA, RB, RC limit at least one comparison value, the existence in the surveyed area of comparing detecting sensor S by least one comparison value of signal and this of transducer or 101 generations of popping one's head in (as adjusted by level 102 and 103)/take and correspondingly wake up the sending part (being microcontroller 105) of transducer.
In this transducer S, in powered battery, (be used to come from the voltage V of one or more battery
batterycome to each element 101,102,103 and 104(main element) feed) time, the cell voltage V of reduction
batterymay cause less desirable sensitivity to increase, then increase the risk of error detection.
This result is with irrelevant to a great extent such as following many factors:
The type of-sensing element 101,
The specific circuit arrangement of-level 102,103, and
The customized configuration of-restriction the value of comparator 104 or the element of comparison value.
Therefore the following discloses content, providing about Fig. 4 is also applicable to sensing element 101 and the governing stage 102,103 (if any) except PIR probe and the comparator 104 with the layout different from illustrative layout in Fig. 3 and 4.
In this respect, in Fig. 3 and 4, identical or equivalent part and parts utilize identical Reference numeral to represent.For simplicity, the related description providing about Fig. 3 can not repeat in Fig. 4.
In the exemplary embodiment of Fig. 4, for example, from the signal of transducer 101 (PIR), cross the level 102 and 103 for adjusting before being fed into comparator 104 being fed into the comparator 104 forward pass warp let-offs.Once comparator 104 is monitored these signals and motion detected, wakes microcontroller 105 up.
In certain embodiments, the possibility of waking microcontroller 105 up can be suppressed, and this microcontroller 105 for example, is not stopped using within a certain opening time (2 seconds).
When sleep pattern (and can not be temporarily suppressed), microcontroller 105 can be waken up again by transducer.
In certain embodiments, microcontroller 105 can configure as follows: no matter when by transducer, wake up, microcontroller 105 checks whether reach time period T
onend, and reaching time period T
onthe situation of end under, message is " at T
oninner light source is opened " can be updated.
The exemplary embodiment of considering in this article can be adapted for the standard alkaline type battery that utilizes output voltage to reduce (for example linearly) during battery and carry out work.The respective change (for example reduce) of width that this may cause the detection window of comparator 104, produces the shortcoming (risk of sensitivity increase, error detection increases) of above having discussed then.
In certain embodiments, this less desirable result can be by making resistance R B (referring to Fig. 3) between an A and B by one group of resistor R1, R2, R3 ..., Rn and replace or supplement (described in Fig. 4) compensating, this group resistor R1, R2, R3 have associated electronic switch Q1, Q2, the Q3 for example being controlled by microcontroller 105 ..., Qn (such as MOSFET).In the exemplary embodiment shown in Fig. 4, n=3.
When " connection " (i.e. conduction), each switch Q1, Q2, Q3 ... make each resistor R1, R2, R3 ... short circuit, thus zero resistance produced.
When "off" (non-conductive), each switch Q1, Q2, Q3 ... allow each resistor R1, R2, R3 ... the resistance value of non-zero is increased to this resistance between an A and B.
In considered exemplary embodiment, " digitally (being on/off) " startup resistor R1, R2, R3 ... the increase of quantity will make the voltage at A place increase and make the lower voltage at B place, result exerts an influence to the width of the detection window of comparator 104, so that compensation is due to cell voltage V
batteryvariation (for example reduce) and the variation (for example reducing) of the detection window width that causes.
The exemplary embodiment of considering absorbs electric current (being power) to minimize, because electronic switch Q1, Q2, Q3 ... this MOSFET demonstrates current absorption within the scope of microampere.
Similarly, in certain embodiments, resistance value is chosen as to R1=R, R2=2R, R3=4R ..., Rn=R2^ (n-1) (being resistance value arranges with the increasing series of 2 power side) allows to control detection window with the equidistant level of 2^n.
In certain embodiments, switch (optionally open and disconnect) switch Q1, Q2, Q3 ... can be controlled by microcontroller 105.
For this reason, microcontroller 105 directly (as described in Figure 4) or indirectly (for example voltage at the some place of voltage divider by the input sensing at comparator 104) carry out sensing voltage V
batteryand to switch Q1, Q2, Q3 ... effect, to keep the pressure drop (substantially) between A and B constant.
In certain embodiments, the simple procedure that completes this operation can comprise and comes as follows startup resistor R1, R2, R3: the summation of the resistance value of resistor is along with voltage V
batteryreduction and little by little increase.
Thereby can be summarized as and comprise two basic steps according to the concept of the exemplary embodiment of Fig. 4:
-detect the voltage (V for example that electric power is provided to transducer S
battery) in any variation (for example reduce), and
-act at least one comparison value that limits comparator voltage divider so that at least one comparison value is constant substantially, thereby any variation that contends with variation (for example reducing) in from the voltage to transducer S power supply and cause thereon, wherein compares with described at least one comparison value by taking the signal that transducer or probe generate.
In some embodiment (such as Fig. 4 illustrated), by the comparison value that takies signals that probe 101 generates and provide with the width by window (between upper threshold value and lower threshold value), compared.Any variation (for example reducing) in voltage detected, that power to transducer S may cause to voltage divider (RA, RB, R1, R2, R3, RC) effect, to make the width of described window constant substantially.
Certainly, without prejudice to cardinal principle of the present invention, do not depart under the situation as defined scope of the present invention in appending claims, about the illustrated and structure that illustrates and the details of embodiment in this article, can change, change even significantly.
Claims (17)
1. take a transducer, comprising:
Sensing probe (101), described sensing probe (101) detects by the taking (P) and generate corresponding sensing signal of the space of described transducer (S) monitoring,
Comparator (104), described comparator comprises the voltage divider (RA, RB, R1, R2, R3, RC) that limits comparison value (A, B), described sensing signal takies described in comparing to detect with described comparison value (A, B),
Voltage sensing device (105), described voltage sensing device sensing is applied to the feed voltage (V of described transducer (S)
battery), wherein said feed voltage (V
battery) variation cause the variation of described comparison value (A, B),
Described voltage divider (RA, RB, R1, R2, R3, RC) comprises at least one resistor (R1, R2, R3) that can selectivity switches (Q1, Q2, Q3), to contend with by described feed voltage (V
electricity pond) variation and the variation of the described comparison value (A, B) that causes.
2. transducer as claimed in claim 1, wherein said voltage divider (RA, RB, R1, R2, R3, RC) limits the comparison window of described sensing signal with the width between upper threshold value (A) and lower threshold value (B), wherein said voltage divider (RA, RB, R1, R2, R3, RC) comprises at least one resistor (R1, R2, R3) that can selectivity switches (Q1, Q2, Q3), to contend with by described feed voltage (V
battery) variation and cause the variation of the width of described comparison window (A, B).
3. the transducer as described in claim 1 or 2, wherein said voltage divider comprises a plurality of resistors (RA, RB, R1, R2, R3, RC), and at least one resistor (R1, R2, R3) in wherein said a plurality of resistors (RA, RB, R1, R2, R3, RC) can selectivity switch (Q1, Q2, Q3) between two different resistance values.
4. transducer as claimed in claim 3, at least one resistor (R1, R2, R3) in wherein said a plurality of resistors (RA, RB, R1, R2, R3, RC) can selectivity switch (Q1, Q2, Q3) between zero resistance value and non-zero resistance value.
5. the transducer as described in claim 3 or 4, wherein said a plurality of resistors (RA, RB, R1, R2, R3, RC) comprise one group of resistor that can switch the resistance value that (Q1, Q2, Q3) arrange to the increasing series of the power side with 2.
6. the transducer as described in any one in claim 3-5, wherein said at least one resistor (R1, R2, R3) can selectivity switching is couple to the electronic switch being associated (Q1, Q2, Q3) that can switch to state of activation, so that be coupled to resistor (R1, R2, the R3) short circuit of described electronic switch (Q1, Q2, Q3).
7. transducer as claimed in claim 6, wherein said electronic switch (Q1, Q2, Q3) comprises MOSFET.
8. the transducer described in any one in claim as the aforementioned, comprise controller (105), described controller is configured to optionally switch in described at least one resistor (R1, R2, R3) in described voltage divider (RA, RB, R1, R2, R3, RC), to contend with by described feed voltage (V
electricity pond) variation and the variation of the described comparison value (A, B) that causes.
9. transducer as claimed in claim 8, wherein said controller (105) is configured to optionally switch in a plurality of resistors that can switch (R1, R2, R3) in described voltage divider (RA, RB, R1, R2, R3, RC), so that the summation of the resistance value of the resistor being started by described switching is along with described feed voltage (V
battery) reduction and little by little increase.
10. the transducer as described in claim 8 or 9, wherein said controller (105) comprises described voltage sensing device.
11. transducers described in any one in claim as the aforementioned, comprise controller (105), the comparative result that is configured to the described comparison value (A, B) in described sensing signal and described comparator (104) indicates described sensing probe (101) just to detect when occupied, is optionally switched to state of activation.
12. transducers as claimed in claim 11, wherein said controller (105) is couple to radio transmitter, sends RF message while taking to detect at described sensing probe (101).
13. transducers as claimed in claim 12, wherein said controller (105) is configured to turn back to sleep pattern after sending described RF message.
14. transducers as claimed in claim 13, wherein said controller (105) is prohibited to be switched to described state of activation after turning back to described sleep pattern in given interval.
15. transducers as described in any one in claim above, wherein said sensing probe (101) is passive infrared or PIR sensing probe.
16. transducers as described in any one in claim above, are included in the Circuit tuning for described sensing signal (102,103) between described sensing probe (101) and described comparator (104).
17. transducers as described in any one in claim above, wherein said transducer is battery powered transducer, therefore described feed voltage (V
battery) be cell voltage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| US201161440885P | 2011-02-09 | 2011-02-09 | |
| US61/440,885 | 2011-02-09 | ||
| PCT/IB2011/051037 WO2012107802A1 (en) | 2011-02-09 | 2011-03-11 | An occupancy sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103535116A true CN103535116A (en) | 2014-01-22 |
| CN103535116B CN103535116B (en) | 2016-11-09 |
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| US (1) | US20140151558A1 (en) |
| EP (1) | EP2674014B1 (en) |
| CN (1) | CN103535116B (en) |
| WO (2) | WO2012107802A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11819198B2 (en) | 2014-06-18 | 2023-11-21 | Setech Co., Ltd. | Feces color detection device |
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|---|---|---|---|---|
| US8135548B2 (en) * | 2006-10-26 | 2012-03-13 | Abbott Diabetes Care Inc. | Method, system and computer program product for real-time detection of sensitivity decline in analyte sensors |
| WO2018060398A1 (en) | 2016-09-29 | 2018-04-05 | Philips Lighting Holding B.V. | Lighting system commissioning |
| JP6945420B2 (en) * | 2017-10-26 | 2021-10-06 | 三菱電機株式会社 | Lighting equipment control device |
| WO2021179128A1 (en) * | 2020-03-09 | 2021-09-16 | 深圳市汇顶科技股份有限公司 | Voltage attack detection circuit and chip |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012107801A1 (en) | 2012-08-16 |
| CN103535116B (en) | 2016-11-09 |
| EP2674014B1 (en) | 2019-06-19 |
| US20140151558A1 (en) | 2014-06-05 |
| WO2012107802A1 (en) | 2012-08-16 |
| EP2674014A1 (en) | 2013-12-18 |
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